Fig. 6
From: Humic acids trigger the weak acids stress response in maize seedlings
a Differential transcription of the SnRK2.2 genes (serine/threonine kinase related to non-fermentative sucrose SNF) and b MDH (malate dehydrogenase) measured by RT-qPCR according the treatments: HA humic acids (8 and 16 mM C L−1); AA acetic acid (0.4 and 4 mM L−1); AS salicylic acid (0.4 and 1.2 mM L−1). The expression was normalized in relation to the control treatment (control = 1). The data represent the mean and the bars the standard deviation (n = 3) in three independent experiments